Heart
hideThe heart is a muscular organ in all vertebrates responsible for pumping blood through the blood vessels by repeated, rhythmic contractions, or a similar structure in annelids, mollusks, and arthropods. The term cardiac (as in cardiology) means "related to the heart" and comes from the Greek καρδιά, kardia, for "heart."
The heart of a vertebrate is composed of cardiac muscle, an involuntary striated muscle tissue which is found only within this organ. The average human heart, beating at 72 beats per minute, will beat approximately 2.5 billion times during a lifetime (about 66 years). It weighs on average 250 g to 300 g in females and 300 g to 350 g in males.
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News tagged with heart
Scientists grow mice heart muscle strip that beats
Oct 15, 2009 |
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(PhysOrg.com) -- Scientists have grown a piece of heart muscle - and then watched it beat - by using stem cells from a mouse embryo, a big step toward one day repairing damage from heart attacks.
Jumping genes, gene loss and genome dark matter
Oct 07, 2009 |
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In research published today by Nature, an international team describes the finest map of changes to the structure of human genomes and a resource they have developed for researchers worldwide to look at the ...
Most babies born this century will live to 100
Oct 01, 2009 |
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(AP) -- Most babies born in rich countries this century will eventually make it to their 100th birthday, new research says. Danish experts say that since the 20th century, people in developed countries are living about three ...
'Top dogs' at school have better health in adulthood
Sep 28, 2009 |
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Children who are the most popular and powerful at school also enjoy better health in adult life compared to counterparts at the bottom end of the pecking order, said a Swedish study published Tuesday.
Study suggests adult stem cells may help repair hearts damaged by heart attack
Dec 02, 2009 |
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Adult stem cells may help repair heart tissue damaged by heart attack according to the findings of a new study to be published in the December 8 issue of the Journal of the American College of Cardiology. Results from t ...
Why we outlive our ape ancestors
Dec 02, 2009 |
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In spite of their genetic similarity to humans, chimpanzees and great apes have maximum lifespans that rarely exceed 50 years. The difference, explains USC Davis School of Gerontology Professor Caleb Finch, is that as humans ...
New stem cell lines approved for tax-paid research
Dec 02, 2009 |
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(AP) -- Scientists can start using taxpayer dollars to do research with 13 batches of embryonic stem cells and the government says dozens more cell lines should be available soon, opening a new era for the potentially life-saving ...
Pickin' Up Good Vibrations to Produce Green Electricity
Nov 30, 2009 |
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(PhysOrg.com) -- Vibrations from the environments we live and work in could be much more widely harnessed as a clean source of electricity, due to cutting-edge UK research.
Study Finds Eating Fruits and Vegetables Lowers Risks of Heart Disease
Nov 25, 2009 |
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(PhysOrg.com) -- A new study of adults aged 70 or older found that increased servings of fruits and vegetables were significantly associated with a decrease of cognitive impairment, and that those eating three or more servings ...
Saving the single cysteine: new antioxidant system found (w/ Video)
Nov 19, 2009 |
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(PhysOrg.com) -- We've all read studies about the health benefits of having a life partner. The same thing is true at the molecular level, where amino acids known as cysteines are much more vulnerable to damage when single ...
Alcohol helps lower heart disease risk for men: study
Nov 19, 2009 |
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Men who drink alcohol every day see a nearly one-third average reduction in the risk of coronary heart disease, according to a long-term study among Spanish men published on Thursday.
Your own stem cells can treat heart disease
Nov 17, 2009 |
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The largest national stem cell study for heart disease showed the first evidence that transplanting a potent form of adult stem cells into the heart muscle of subjects with severe angina results in less pain and an improved ...
Heart disease found in Egyptian mummies
Other Sciences / Archaeology & Fossils
Nov 17, 2009 |
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Hardening of the arteries has been detected in Egyptian mummies, some as old as 3,500 years, suggesting that the factors causing heart attack and stroke are not only modern ones; they afflicted ancient people, ...
How fish is cooked affects heart-health benefits of omega-3 fatty acids
Nov 17, 2009 |
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If you eat fish to gain the heart-health benefits of its omega-3 fatty acids, baked or boiled fish is better than fried, salted or dried, according to research presented at the American Heart Association's Scientific Sessions ...
Transcendental Meditation helped heart disease patients lower cardiac disease risks by 50 percent
Nov 16, 2009 |
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Patients with coronary heart disease who practiced the stress-reducing Transcendental Meditation® technique had nearly 50 percent lower rates of heart attack, stroke, and death compared to nonmeditating controls, according ...
